mysteries of the Church do not destroy matter or make it cease to be material. Even in the great mystery of the Holy Eucharist, the bread is not destroyed: For we offer to Him His own, announcing consistently the fellowship and union of the flesh and Spirit. For as the bread, which is produced from the earth, when it receives the invocation of God, is no longer common bread, but the Eucharist, consisting of two realities, earthly and heavenly; so also our bodies, when they receive the Eucharist,